UV-photoprotecting emulsions comprising micronized insoluble screening agents and associative polymers

ABSTRACT

Topically applicable, water-resistant cosmetic/dermatological emulsions well suited for the UV-photoprotection of human skin and/or hair contain an effective UV-photoprotecting amount of at least one micronized organic UV-screening agent insoluble therein, the mean particle size of such micronized particles ranging from 0.01 to 2 μm, and further containing at least one associative polymer which is characteristically other than a C 8 -C 16  alkyl polyglucoside.

CROSS-REFERENCE TO COMPANION APPLICATIONS

Copending applications Ser. No. 09/693,888, Ser. No. 09/693,894 and Ser.No 09/693,887, each assigned to the assignee hereof, each filedconcurrently herewith and each also hereby expressly incorporated byreference.

CROSS-REFERENCE TO PRIORITY APPLICATION

This application claims priority under 35 U.S.C. §119 of FR-99/13220,filed Oct. 22, 1999, hereby expressly incorporated by reference.

BACKGROUND OF THE INVENTION

1. Technical Field of the Invention

The present invention relates to novel cosmetic/dermatological emulsionscomprising at least one photoprotective system/agent suited forscreening out UV-irradiation, containing at least one organicUV-screening agent insoluble in such emulsions, in micronized form orstate, in which the mean size of the particles ranges from 0.01 to 2 μm,and also comprising at least one associative polymer characteristicallydifferent from, or other than a C₈-C₁₆ alkyl polyglucoside.

The present invention also relates to cosmetic/dermatologicalcompositions suited for the photoprotection of the skin or of the hair.

2. Description of the Prior Art

It is known to this art that light radiation of wavelengths of from 280nm to 400 nm permits tanning of the human epidermis, and that radiationof wavelengths more particularly of from 280 nm to 320 nm, i.e., UV-Bradiation, causes erythemas and skin burns which can hinder thedevelopment of natural tanning.

For these reasons as well as for aesthetic reasons, there is a constantdemand to control this natural tanning such as to thereby control thecolor of the skin; it is therefore advisable to screen out UV-Bradiation.

It is also known to this art that UV-A radiation of wavelengths of from320 nm to 400 nm, which promotes tanning of the skin, also is capable ofcausing damage thereto, in particular in the case of a sensitive skin orof a skin continually exposed to solar radiation. UV-A radiation,causes, in particular, loss of elasticity of the skin and the appearanceof wrinkles which promotes premature skin aging. UV-A radiation promotesthe onset of the erythema reaction or amplifies this reaction in certainindividuals and may even be responsible for phototoxic or photoallergicreactions. Thus, for aesthetic and cosmetic reasons such as thepreservation of the natural elasticity of the skin for example, anincreasing number of individuals seek to control the effect of UV-Aradiation on their skin. It is therefore desirable to also screen outUV-A radiation.

A wide variety of cosmetic compositions intended for the photoprotection(UV-A and/or UV-B) of the skin are also known to this art.

These anti-sun or sunscreen compositions are quite often provided in theform of an emulsion, of the oil-in-water (O/W) type (namely, acosmetically and/or dermatologically acceptable carrier comprising anaqueous dispersing continuous phase and a fatty dispersed discontinuousphase) or of the water-in-oil (W/O) type (dispersed aqueous phase in acontinuous fatty phase), which contains, at various concentrations, oneor more lipophilic conventional organic UV-screening agents and/orinorganic nanopigments of metal oxides, which are suited for selectivelyabsorbing the harmful UV radiation, these screening agents (and thequantities thereof) being selected according to the desired sunprotection factor (the sun protection factor (SPF) being mathematicallyexpressed by the ratio of the irradiation time required to attain theerythematogenic threshold with the UV-screening agent to the timerequired to attain the erythematogenic threshold in the absence ofUV-screening agent). In such emulsions, the hydrophilic screening agentsare present in the aqueous phase and the lipophilic screening agents arepresent in the fatty phase.

The oil-in-water emulsions are, in general, more accepted by theconsumer than the water-in-oil emulsions because, in particular, oftheir pleasant feel (similar to water) and their presentation in theform of a non-oily cream or milk; however, they also more readily losetheir UV protection efficacy as soon as they come into contact withwater. Indeed, the hydrophilic screening agents tend to disappear inwater, upon washing in the sea or in a swimming pool, under the showeror when engaged in water sports; thus, anti-sun or sunscreencompositions containing same, whether alone or combined with lipophilicscreening agents, no longer provide the desired initial protection assoon as the substrate (skin or hair) to which they have been applied iscontacted with water.

Anti-sun (sunscreen) compositions exhibiting improved resistance towater have been formulated as water-in-oil emulsions. Indeed, ahydrophilic screening agent is more stable to water in a water-in-oilemulsion than in an oil-in-water emulsion. However, as indicated above,such compositions are not yet completely satisfactory since theypromote, after application, a fat-like impression which is particularlyunpleasant for the user.

Thus, serious need continues to exist for anti-sun or sunscreencompositions which impart to the skin and/or the hair effective solarprotection which is stable over time and resistant to water (stabilityto water) and the cosmetic performance of which presents features thatwould be comparable to those obtained with conventional oil/wateremulsions.

SUMMARY OF THE INVENTION

It has now surprisingly and unexpectedly been determined that specificemulsions containing at least one organic UV-screening agent insolublein micronized form in the different phases of these emulsions and atleast one associative polymer not only provide anti-sun compositionswhose cosmetic performance features are comparable to those generallyassociated with a conventional sunscreen composition formulated as anoil/water emulsion, but also exhibit good stability as well as enhancedstability to water.

These discoveries constitute the basis of the present invention.

Briefly, the present invention features cosmetic/dermatologicalemulsions comprising at least one photoprotective system or agentadopted for screening out UV radiation, containing at least one organicUV-screening agent insoluble in such emulsions, in micronized form, inwhich the mean size of the particles ranges from 0.01 μm to 2 μm, butalso comprising at least one associative polymer characteristicallydifferent from, or other than a C₈-C₁₆ alkyl polyglucoside.

DETAILED DESCRIPTION OF BEST MODE AND SPECIFIC/PREFERRED EMBODIMENTS OFTHE INVENTION

More particularly according to the present invention, by “cosmetic ordermatological emulsion” is intended any emulsion in which the aqueousphase and the fatty phase contain substances or substrates which arecosmetically or dermatologically acceptable for topical application ontohuman keratinous materials including the skin, the hair, the eyelashes,the eyebrows, the lips, the nails or the mucous membranes.

By “insoluble organic UV-screening agent” is intended according to thepresent invention organic UV-screening agents which are insoluble in thecosmetic media generally included in anti-sun formulations and moreparticularly whose solubility in water at 25° C. is less than 0.1% byweight and whose solubility in paraffin oil at 25° C. is less than 1% byweight.

By “photoprotective system suited for screening out UV radiation” isintended any system including one or more organic compounds and/orinorganic compounds screening out UV-A and/or UV-B radiation.

And by “associative polymer” is intended any amphiphilic polymercomprising in its structure at least one fatty chain and at least onehydrophilic moiety.

The present invention thus features formulating the subject emulsionsinto cosmetic compositions for the protection of the skin and/or of thehair against ultraviolet radiation, in particular solar radiation.

The insoluble organic screening agents according to the invention areprovided in micronized form. The mean or average size of the particlesranges from 0.01 μm to 2 μm and more preferably from 0.02 μm to 1.5 μmand even more preferably from 0.05 μm to 1.0 μm.

The insoluble organic screening agents according to the invention may beprovided in the desired particulate form by any appropriate means suchas, in particular, grinding in the dry state or in solvent medium,sieving, spray-drying, micronization or spraying.

The insoluble organic screening agents according to the invention inmicronized form may, in particular, be provided by a method of grindingan insoluble UV-screening agent in the form of particles having a coarsesize in the presence of an appropriate surfactant which makes itpossible to enhance the dispersion of the particles thus obtained in thecosmetic formulations.

One embodiment of a method of micronization of insoluble organicscreening agents is described in GB-A-2,303,549 and EP-A-893119incorporated by reference herein. The grinding apparatus according tothe invention may be a jet mill, a ball mill, a vibratory mill or ahammer mill and preferably a mill featuring high-speed agitation or animpact mill and more particularly a rotating ball mill, a vibratorymill, a tube mill or a rod mill.

According to this particular methodology, the alkyl polyglucosideshaving the structure C_(n)H_(2n+1)O(C₆H₁₀O₅)_(x)H in which n is aninteger from 8 to 16 and x is the average degree of polymerization ofthe structural unit (C₆H₁₀O₅) and ranges from 1.4 to 1.6, are includedas surfactants for the grinding of the screening agents. They areadvantageously selected from among C₁-C₁₂ esters of a compound havingthe structure C_(n)H_(2n+1)O(C₆H₁₀O₅)_(x)H and more precisely an esterprepared by reacting a C₁-C₁₂ carboxylic acid such as formic, acetic,propionic, butyric, sulfosuccinic, citric or tartaric acid with one ormore free OH functions on the glucoside unit (C₆H₁₀O₅). Such surfactantsare typically employed at a concentration ranging from 1% to 50% byweight and more preferably from 5% to 40% by weight relative to theinsoluble screening agent in its micronized form.

The associative polymers in accordance with the present invention may beanionic, nonionic, cationic or amphoteric.

Exemplary of the associative anionic polymers are those comprising atleast one hydrophilic structural unit, and at least one allyl etherstructural unit containing a fatty chain, more particularly those inwhich the hydrophilic structural unit comprises an ethylenic unsaturatedanionic monomer, especially a vinylcarboxylic acid and more preferablyan acrylic acid, a methacrylic acid or mixtures thereof, and in whichthe allyl ether unit containing a fatty chain corresponds to a monomerhaving the following formula (I):

CH₂═C(R′)CH₂OB_(n)R  (I)

in which R′ is H or CH₃, B represents the ethyleneoxy radical, n is zeroor is an integer ranging 1 to 100, R is a hydrocarbon radical selectedfrom among alkyl, arylalkyl, aryl, alkylaryl or cycloalkyl radicals,having from 8 to 30 carbon atoms, preferably 10 to 24, and morepreferably from 12 to 18 carbon atoms. A more particularly preferredstructural unit of formula (I) according to the present invention is astructural unit in which R′ is H, n is equal to 10, and R is a stearyl(C₁₈) radical.

Anionic amphiphilic polymers of this category are described andprepared, via technique for polymerization in emulsion, in EP-0,216,479.

Exemplary of these associative anionic polymers are those polymersprepared from 20% to 60% by weight of acrylic acid and/or of methacrylicacid, from 5% to 60% by weight of lower alkyl(meth)acrylates, from 2% to50% by weight of allyl ether bearing a fatty chain substituent offormula (I), and from 0% to 1% by weight of a crosslinking agent whichis a well known copolymerizable polyethylenic unsaturated monomer suchas diallyl phthalate, allyl (meth)acrylate, divinylbenzene,(poly)ethylene glycol dimethacrylate and methylenebisacrylamide. Thereare most particularly preferred according to the invention.

Among the latter, the crosslinked terpolymers of methacrylic acid, ethylacrylate, polyethylene glycol (10 EO) stearyl alcohol ether (Steareth10), in particular those marketed by Allied Colloids, under thetrademarks SALCARE SC 80 and SALCARE SC 90 which are aqueous emulsionscontaining 30% of a crosslinked terpolymer of methacrylic acid, of ethylacrylate and of steareth-10-allyl ether (40/50/10) are most particularlypreferred.

Exemplary associative anionic polymers include those anionic polymerscomprising at least one hydrophilic structural unit of the olefinicunsaturated carboxylic acid type, and at least one hydrophobicstructural unit exclusively of the (C₁₀-C₃₀)alkyl ester of unsaturatedcarboxylic acid type.

Preferably, these polymers are selected from among those whosehydrophilic structural unit of the olefinic unsaturated carboxylic acidtype corresponds to the monomer having the following formula (II):

in which R₁ is H or CH₃ or C₂H₅, namely, acrylic acid, methacrylic acidor ethacrylic acid structural units, and whose hydrophobic structuralunit of the (C₁₀-C₃₀)alkyl ester of unsaturated carboxylic acid typecorresponds to the monomer having the following formula (III):

in which R₂ is H or CH₃ or C₂H₅ (namely, acrylate, methacrylate orethacrylate structural units) and preferably H (acrylate units) or CH₃(methacrylate units), and R₃ is a C₁₀-C₃₀, and preferably C₁₂-C₂₂, alkylradical.

(C₁₀-C₃₀)alkyl esters of unsaturated carboxylic acids in accordance withthe invention include, for example, lauryl acrylate, stearyl acrylate,decyl acrylate, isodecyl acrylate and the corresponding methacrylates,lauryl methacrylate, stearyl methacrylate, decyl methacrylate andisodecyl methacrylate.

Anionic polymers of this type are for example described and preparedaccording to the methodology set forth in U.S. Pat. Nos. 3,915,921 and4,509,949.

Among such associative anionic polymers, particularly preferred arethose polymers prepared from a mixture of monomers comprising:

(i) essentially acrylic acid,

(ii) an ester having the following formula (III):

in which R₂ is H or CH₃ and R₃ is an alkyl radical having from 12 to 22carbon atoms, and

(iii) a crosslinking agent, which is a well known copolymerizablepolyethylenic unsaturated monomer such as diallyl phthalate, allyl(meth)acrylate, divinylbenzene, (poly)ethylene glycol dimethacrylate andmethylenebisacrylamide.

Among these associative anionic polymers, more particularly preferredare those comprising 95% to 60% by weight of acrylic acid (hydrophilicstructural unit), 4% to 40% by weight of C₁₀-C₃₀ alkyl acrylate(hydrophobic structural unit), and 0% to 6% by weight of crosslinkingpolymerizable monomer, or, alternatively, those comprising 98% to 96% byweight of acrylic acid (hydrophilic structural unit), 1% to 4% by weightof C₁₀-C₃₀ alkyl acrylate (hydrophobic structural unit) and 0.1% to 0.6%by weight of crosslinking polymerizable monomer such as those describedabove.

Exemplary of the above polymers are the products marketed by Goodrichunder the trademark PEMULEN TR1, PEMULEN TR2, CARBOPOL 1382, and evenmore preferably PEMULEN TR1, and the product marketed by S.E.P.P.I.C.under the trademark COATEX SX. These are most particularly preferredaccording to the present invention.

Exemplary associative anionic polymers also include the terpolymers ofmaleic anhydride/C₃₀-C₃₈ α-olefin/alkyl maleate such as the product(maleic anhydride/C₃₀-C₃₈ α-olefin/isopropyl maleate copolymer) marketedunder the trademark PERFORMA V 1608 by Newphase Technologies.

Associative anionic polymers which are also exemplary are the acrylicterpolymers comprising:

(a) about 20% to 70% by weight of a carboxylic acid with α,monoethylenic unsaturation,

(b) about 20% to 80% by weight of a nonsurfactant monomer withα,β-monoethylenic unsaturation different from (a),

(c) about 0.5% to 60% by weight of a nonionic monourethane which is theproduct of the reaction of a monohydric surfactant with a monoisocyanatewith monoethylenic unsaturation, such as those described inEP-A-0,173,109 and more particularly that described in Example 3,namely, a methacrylic acid/methyl acrylate/dimethyl metaisopropenylbenzyl isocyanate of ethoxylated (40 EO) behenyl alcohol terpolymer in25% aqueous dispersion.

The nonionic associative polymers according to the invention arepreferably selected from among:

(1) celluloses modified by groups comprising at least one fatty chainsubstituent, including, for example:

(i) the hydroxyethylcelluloses modified by groups comprising at leastone fatty chain such as alkyl, arylalkyl or alkylaryl groups, ormixtures thereof, and in which the alkyl groups are preferably C₈-C₂₂,such as the product NATROSOL PLUS GRADE 330 CS (C₁₆ alkyls) marketed byAqualon, or the product BERMOCOLL EHM 100 marketed by Berol Nobel,

(ii) those modified by polyalkylene glycol ether of alkylphenol groups,such as the product AMERCELL POLYMER HM-1500 (polyethylene glycol (15)ether of nonylphenol) marketed by Amerchol;

(2) the hydroxypropylguars modified by groups comprising at least onefatty chain such as the product ESAFLOR HM 22 (C₂₂ alkyl chain) marketedby Lamberti, the products RE 210-18 (C₁₄ alkyl chain) and RE 205-1 (C₂₀alkyl chain) marketed by Rhodia;

(3) the polyether/polyurethanes comprising in their chain bothhydrophilic sequences which are typically of a polyoxyethylenated natureand hydrophobic sequences which may be aliphatic chains alone and/orcycloaliphatic and/or aromatic chains;

(4) the copolymers of vinylpyrrolidone and of hydrophobic monomershaving a fatty chain, for example:

(i) the products ANTARON V216 or GANEX V216 (vinylpyrrolidone/hexadecenecopolymer) marketed by I.S.P.,

(ii) the products ANTARON V220 or GANEX V220 (vinylpyrrolidone/eicosenecopolymer) marketed by I.S.P.;

(5) the copolymers of C₁-C₆ alkyl methacrylates or acrylates and ofamphiphilic monomers comprising at least one fatty chain such as, forexample, the oxyethylenated stearyl acrylate/methyl acrylate copolymermarketed by Goldschmidt under the trademark ANTIL 208;

(6) the copolymers of hydrophilic methacrylates or acrylates and ofhydrophobic monomers comprising at least one fatty chain such as, forexample, the polyethylene glycol methacrylate/lauryl methacrylatecopolymer.

Preferably, the polyether/polyurethanes comprise at least two lipophilichydrocarbon chains, having from C₆ to C₃₀ carbon atoms, separated by ahydrophilic sequence; the hydrocarbon chains may be pendent chains orchains at the end of a hydrophilic sequence. In particular, one or morependent chains are envisaged. In addition, the polymer may comprise ahydrocarbon chain at one end or at both ends of a hydrophilic sequence.

The polyether/polyurethanes may be polyblocks, in particular in triblockform. The hydrophobic sequences may be at each end of the chain (forexample: triblock copolymer with hydrophilic central sequence) ordistributed both at the ends and along the chain (polyblock copolymerfor example). These same polymers may also be in the form of graft unitsor may be star-shaped.

Preferably, the associative nonionic polyether/polyurethanes aretriblock copolymers whose hydrophilic sequence is a polyoxyethylenatedchain comprising from 50 to 1,000 oxyethylenated groups. Nonionicpolyether/polyurethanes comprise a urethane bond between the hydrophilicsequences, hence the origin of the name.

By extension, those whose hydrophilic sequences are linked by otherchemical bonds to the lipophilic sequences are also included among theassociative nonionic polyether/polyurethanes.

Exemplary associative nonionic polyether/polyurethanes according to theinvention include the C₁₆-EO,₂₀-C₁₆polymer marketed by Servo Delden(under the trademark SER-AD FX1100, a molecule with a urethane functionand a weight-average molecular weight of 1,300), EO being anoxyethylenated unit. As associative polymer, also exemplary is Rhéolate205 with a urea function marketed by Rheox or, alternatively, Rhéolate208, 204 or 212, as well as Acrysol RM 184, Aculyn 44 and Aculyn 46marketed by Rohm & Haas.

Also exemplary is the product ELFACOS T210 containing a C₁₂₋₁₄ alkylchain and the product ELFACOS T212 containing a C₁₈ alkyl chain,marketed by AKZO.

The product DW 1206B marketed by Rohm & Haas containing a C₂₀ alkylchain and with a urethane bond, containing 20% dry solids content inwater, is also exemplary.

Solutions or dispersions of these polymers, in particular, in water orin an aqueous/alcoholic medium, can be used. Exemplary of such polymersare SER-AD FX1010 and SER-AD 1035 marketed by Hüls, Rhéolate 255,Rhéolate 278 and Rhéolate 244 marketed by Rheox. The products DW 1206Fand DW 1206J are also intended.

The polyurethanes which are suitable according to the invention are, inparticular, those described in the article by G. Fonnum, J. Bakke andFk. Hansen, Colloid Polym. Sci., 271, 380, 389 (1993).

The cationic associative polymers according to the present invention arepreferably selected from among the quaternized cellulose derivatives andthe polyacrylates with amine-containing side groups.

The quaternized cellulose derivatives include, in particular:

(i) the quaternized celluloses modified by groups comprising at leastone fatty chain, such as the alkyl, arylalkyl or alkylaryl groups havingat least 8 carbon atoms, or mixtures thereof;

(ii) the quaternized hydroxyethylcelluloses modified by groupscomprising at least one fatty chain, such as the alkyl, arylalkyl oralkylaryl groups having at least 8 carbon atoms, or mixtures thereof.

The polyacrylates with amine-containing side groups, quaternized orotherwise, contain, for example, hydrophobic groups of the steareth 20type (polyoxyethylenated (20) stearyl alcohol).

The alkyl radicals borne by the above quaternized celluloses orhydroxyethylcelluloses preferably have from 8 to 30 carbon atoms. Thearyl radicals are preferably phenyl, benzyl, naphthyl or anthrylradicals.

Exemplary quaternized alkylhydroxyethylcelluloses containing C₈-C₃₀fatty chains are the products QUATRISOFT LM 200, QUATRISOFT LM-X529-18-A, QUATRISOFT LM-X 529-18B (C₁₂ alkyl) and QUATRISOFT LM-X 529-8(C₁₈ alkyl) marketed by Amerchol and the products CRODACEL QM, CRODACELQL (C₁₂ alkyl) and CRODACEL QS (C₁₈ alkyl) marketed by Croda.

Exemplary polyacrylates with amine-containing side chains are thepolymers 8781-121B or 9492-103 marketed by National Starch.

Exemplary of the associative amphoteric polymers of the invention arethe branched or unbranched, crosslinked or non-crosslinked, amphotericpolymers which are prepared by copolymerization:

(1) of at least one monomer of formula (IVa) or (IVb):

in which R₄ and R₅, which may be identical or different, are each ahydrogen atom or a methyl radical, R₆, R₇ and R₈, which may be identicalor different, are each a linear or branched alkyl radical having from 1to 30 carbon atoms, Z is an NH group or an oxygen atom, n is an integerranging from 2 to 5, A⁻ is an anion derived from an organic or inorganicacid, such as a methosulfate anion, or a halide such as chloride orbromide;

(2) of at least one monomer of formula (V):

in which R₉ and R₁₀, which may be identical or different, and each ahydrogen atom or a methyl radical, and Z₁ is an OH group or a groupNHC(CH₃)₂CH₂SO₃H;

(3) of at least one monomer of formula (VI):

in which R₉ and R₁₀, which may be identical or different, are each ahydrogen atom or a methyl radical, X is an oxygen or nitrogen atom andR₁₁ is a linear or branched alkyl radical having from 1 to 30 carbonatoms; and

(4) optionally, at least one crosslinking or branching agent; with theproviso that at least one of the monomers of formula (IVa), (IVb) or(VI) includes at least one fatty chain having from 8 to 30 carbon atomsand with the further proviso that said compounds of the monomers offormulae (IVa), (IVb), (V) and (VI) may be quaternized, for example by aC₁-C₄ alkyl halide or a C₁-C₄ dialkyl sulfate.

The monomers of formulae (IVa) and (IVb) of the present invention arepreferably selected from among:

(i) dimethylaminoethyl methacrylate, dimethylaminoethyl acrylate;

(ii) diethylaminoethyl methacrylate, diethylaminoethyl acrylate;

(iii) dimethylaminopropyl methacrylate, dimethylaminopropyl acrylate;

(iv) dimethylaminopropyl methacrylamide, dimethylaminopropyl acrylamide,optionally quaternized, for example, with a C₁-C₄ alkyl halide or aC₁-C₄ dialkyl sulfate.

The monomer of formula (IVa) is preferablyacrylamidopropyltrimethylammonium chloride ormethacrylamidopropyltrimethylammonium chloride.

The compounds of formula (V) of the present invention are preferablyselected from among acrylic acid, methacrylic acid, crotonic acid,2-methylcrotonic acid, 2-acrylamido-2-methylpropanesulfonic acid and2-methacrylamido-2-methylpropanesulfonic acid. More preferably, themonomer of formula (V) is acrylic acid.

The monomers of formula (VI) of the present invention are preferablyselected from among C₁₂-C₂₂, and more particularly C₁₆-C₁₈, alkylacrylates or methacrylates.

The crosslinking or branching agent is preferably selected from amongN,N′-methylenebisacrylamide, triallylmethylammonium chloride, allylmethacrylate, n-methylolacrylamide, polyethylene glycol dimethacrylate,ethylene glycol dimethacrylate, diethylene glycol dimethacrylate,1,6-hexanediol dimethacrylate and allylsucrose.

The polymers according to the invention may also contain other monomerssuch as nonionic monomers and, in particular, C₁-C₄ alkyl acrylates ormethacrylates.

The ratio of the number of cationic charges/anionic charges in theseamphoteric polymers is preferably equal to about 1.

The weight-average molecular weight of the associative amphotericpolymers exhibit a weight-average molecular mass greater than 500,preferably of from 10,000 to 10,000,000 and even more preferably from100,000 to 8,000,000.

Preferably, the associative amphoteric polymers of the invention containfrom 1 to 99 mol %, more preferably from 20 to 95 mol % and even morepreferably from 25 to 75 mol % of compound(s) of formula (IVa) or (IVb).They also preferably contain from 1 to 80 mol %, more preferably from 5to 80 mol % and still more preferably from 25 to 75 mol % of compound(s)of formula (V). The content of compound(s) of formula (VI) preferablyranges from 0.1 to 70 mol %, more preferably from 1 to 50 mol % and evenmore preferably from 1 to 10 mol %. The crosslinking or branching agent,when it is present, preferably ranges from 0.0001 to 1 mol % and evenmore preferably from 0.0001 to 0.1 mol %.

Preferably, the molar ratio between the compound(s) of formula (IVa) or(IVb) and the compound(s) of formula (V) ranges from 20:80 to 95:5 andmore preferably from 25:75 to 75:25.

Representative associative amphoteric polymers according to theinvention are described in WO-98/44,012.

The amphoteric polymers which are particularly preferred according tothe invention are acrylic acid/acrylamidopropyltrimethyl-ammoniumchloride/stearyl methacrylate copolymers.

According to one particular embodiment of the invention, the associativepolymer(s) play the role of emulsifier of the oily phase in the aqueousphase. When the associative polymer is present as sole emulsifier, it isvery advantageously present in an amount ranging from 0.1% to 20% of thetotal weight of the composition, preferably in an amount ranging from0.5% to 10%.

The insoluble organic UV-screening agents in accordance with thisinvention may be selected, in particular, from among the organicUV-screening agents of the oxanilide type, of the triazine type, of thetriazole type, of the vinylamide type and of the cinnamide type.

Exemplary UV-screening agents of the oxanilide type include those havingthe structural formula (1):

in which T₁, T′₁, T₂ and T′₂, which may be identical or different, areeach a C₁-C₈ alkyl radical or a C₁-C₈ alkoxy radical. These compoundsare described in WO-95/22,959.

Exemplary thereof are the commercial products TINUVIN 315 and TINUVIN312 marketed by Ciba-Geigy and respectively having the structuralformulae:

The preferred 1,3,5-triazine derivatives in accordance with theinvention have the following structural formula (2):

in Which X₁, X₂ and X₃, which may be identical or different, are each anoxygen atom or a radical —NZ—; the radicals Z, which may be identical ordifferent, are each hydrogen or a linear or branched C₁-C₄ alkylradical, a C₅-C₁₂ cycloalkyl radical optionally substituted with one ormore C₁-C₄ alkyl radicals; T₃, T₄ and T₅ , which may be identical ordifferent, are each hydrogen, an alkali metal, an ammonium radical whichis optionally substituted with one or more alkyl or hydroxyalkylradicals, a linear or branched C₁-C₁₈ alkyl radical, a C₅-C₁₂ cycloalkylradical which is optionally substituted with one or more C₁-C₄ alkylradicals, a polyoxyethylenated radical having from 1 to 6 ethylene oxideunits and whose terminal OH group is methylated or a radical of thefollowing formulae (3), (4) or (5):

in which T₆ is hydrogen or a methyl radical; T₇ is a C₁-C₉ alkylradical; p is an integer ranging from 0 to 3; q is an integer rangingfrom 1 to 10; A is a C₄-C₈ alkyl radical or a C₅-C₈ cycloalkyl radical;B is a linear or branched C₁-C₈ alkyl radical, a C₅-C₈ cycloalkylradical, an aryl radical which is optionally substituted with one ormore C₁-C₄ alkyl radicals; and T, is hydrogen or a methyl radical.

A first preferred family of 1,3,5-triazine derivatives is that which is,in particular, described in EP-A-0,517,104 (expressly incorporated byreference herein), and the 1,3,5riazines having the above formula (2)while satisfying all of the following characteristics:

(i) X₁, X₂ and X₃ are identical and are each an oxygen atom;

(ii) T₃ is a C₅-C₁₂ cycloalkyl radical which is optionally substitutedwith one or more C₁-C₄ alkyl radicals, a radical of formula (3), (4) or(5) above in which B is a C₁-C₄ alkyl radical, and T₈ is the methylradical;

(iii) T₄ and T₅, which may be identical or different, are each hydrogen,an alkali metal, an ammonium radical which is optionally substitutedwith one or more alkyl or hydroxyalkyl radicals, a linear or branchedC₁-C₁₈ alkyl radical, a C₅-C₁₂ cycloalkyl radical which is optionallysubstituted with one or more C₁-C₄ alkyl radicals, or a radical offormula (3), (4) or (5) above in which B is a C₁-C₄ alkyl radical and T₈is a methyl radical.

A second preferred family of 1,3,5-triazine derivatives according to theinvention is that, in particular, described in EP-A-0,570,838 (alsohereby expressly incorporated by reference), and the 1,3,5-triazineshaving the formula (2) and satisfying all of the followingcharacteristics:

(i) X₁ is an oxygen atom, X₂ is the —NH— radical or an oxygen atom, andX₃ is the —NH— radical;

(ii) T₅ is a linear or branched C₁-C₁₈ alkyl radical, or a C₅-C₁₂cycloalkyl radical which is optionally substituted with one or moreC₁-C₄ alkyl radicals;

(ii) T₃ is hydrogen, an alkali metal, an ammonium radical, a radical offormula (5), a linear or branched C₁-C₁₈ alkyl radical, a C₅-C₁₂cycloalkyl radical which is optionally substituted with one or moreC₁-C₄ alkyl radicals, with the proviso that if X₂ is the —NH— radical,then T₄ is a linear or branched C₁-C₁₈ alkyl radical, or a C₅-C₁₂cycloalkyl radical which is optionally substituted with one or moreC₁-C₄ alkyl radicals; and with the further proviso that if X₂ is anoxygen atom, then T₄ is hydrogen, an alkali metal, an ammonium radical,a radical of formula (5), a linear or branched C₁-C₁₈ alkyl radical, ora C₅-C₁₂ cycloalkyl radical which is optionally substituted with one ormore C₁-C₄ alkyl radicals.

A third preferred family of 1,3,5-triazine derivatives according to theinvention is that, in particular, described in EP-A-0,796,851 (alsoexpressly incorporated by reference), and the 1,3,5-triazines having theformula (2) and satisfying all of the following characteristics:

(i) X₁, X₂ and X₃ are each —NZ—;

(ii) the radicals Z, which may be identical or different, are eachhydrogen or a linear or branched C₁-C₁₈ alkyl radical, or a C₅-C₁₂cycloalkyl radical which may be substituted with one or more C₁-C₄ alkylradicals;

(iii) T₃, T₄ and T₅, which may be identical or different, are eachhydrogen or a radical Z.

These organic UV-screening agents of the triazine type are described inU.S. Pat. No. 4,617,390 and in EP-0,517,104, EP-0,570,838 andEP-0,796,851 (expressly incorporated by reference).

Exemplary UTV-screening agents of the triazine type of formula (2) are,more particularly:

2,4,6-tris[p-(2′-ethylhexyl-1′-oxycarbonyl)anilino]-1,3,5-triazine whichis a screening agent known per se, active in the UV-B range, existing insolid form, and which is marketed, in particular, under the trademark“UVINUL T150” by BASF this product has the following structural formula:

in which T is a 2ethylhexyl radical; and

2-[(p-(tert-butylamido)anilino]-4,6-bis[(p-(2′-ethylhexyl-1′-oxycarbonyl)anilino]-1,3,5-triazine,having the following structural formula:

in which T′ is a 2-ethylhexyl radical and T is a tert-butyl radical.

Also exemplary insoluble UV-screening agents of the triazine type inaccordance with the invention are the insoluble derivatives of striazinesubstituted by benzalmalonate and/or phenylcyanoacrylate groups, such asthose described in EP-A-0,790,243 (also expressly incorporated byreference).

Among these UV-screening agents of the triazine type, the followingcompounds are more particularly exemplary:

2,4,6-tris(diethyl 4′-aminobenzalmalonate)-striazine;

2,4,6-tris(diisopropyl 4′-aminobenzalmalonate)s-triazine;

2,4,6-tris(dimethyl 4′-aminobenzalmalonate)-striazine;

2,4,6-tris(ethyl α-cyano-4-aminocinnamate)-striazine.

Among the insoluble UV-screening agents of the triazine type inaccordance with the invention are those having the following structuralformula

in which R¹, R², R³ are independently phenyl, phenoxy, pyrrolo, in whichthe phenyl, phenoxy and pyrrolo radicals are optionally substituted withone, two or three substituents selected from among OH, C₁-C₁₈ alkyl oralkoxy, C₁-C₁₈, carboxyalkyl, C₅-C₈ cycloalkyl, a methylidenecamphorgroup, a group —(CH═CH)_(n)(CO)—OR⁴, wherein R⁴ is either C₁-C₁₈ alkylor cinnamyl, and n is equal to 0 or 1.

These compounds are described in WO-97/03,642, GB-2,286,774,EP-0-743,309, WO-98/22,447, GB-2,319,523 (expressly incorporated byreference).

Among the insoluble UV-screening agents of the triazine type inaccordance with the invention, exemplary are the insoluble derivativesof s-triazine substituted by benzotriazole and/or benzothiazole groups,such as those described in WO-98/25,922 (also expressly incorporated byreference).

More particularly exemplary are:

2,4,6-tris[(3′-benzotriazol-2-yl-2′-hydroxy-5′-methyl)phenylamino]-s-triazine;and

2,4,6-tris[(3′-benzotriazol-2-yl-2′-hydroxy-5′-ter-octyl)phenylamino]-s-triazine.

Exemplary organic UV-screening agents of the triazole type in accordancewith the invention are those of the following structural formula (7) asdescribed in WO-95/22,959 (also expressly incorporated by reference):

in which T₉ is a hydrogen atom or a C₁-C₁₈ alkyl radical; and T₁₀ andT₁₁, which may be identical or different, are each a C₁-C₈ alkyl radicalwhich is optionally substituted with a phenyl radical.

Exemplary compounds of formula (7) are the commercial products TINUVIN328, 320, 234 and 350 marketed by Ciba-Geigy having the followingstructural formulae:

Exemplary organic UV-screening agents of the triazole type in accordancewith the invention are the compounds described in. U.S. Pat. Nos.5,687,521, 5,687,521, 5,373,037, 5,362,881 and, in particular,[2,4′-dihydroxy-3-(2H-benzotriazol-2-yl)-5-(1,1,3,3-tetramethylbutyl)-2′-n-octoxy-5′-benzoyl]diphenylmethanemarketed under the trademark MIXXIM PB30 by Fairmount Chemical andhaving the structural formula:

And exemplary organic UV-screening agents of the benzotriazole type inaccordance with the invention are themethylenebis(hydroxyphenyl-benzotriazole) compounds having the followingstructural formula:

in which the radicals T₁₂ and T₁₃, which may be identical or different,are each a C₁-C₁₈ alkyl radical which may be substituted with one ormore radicals selected from among a C₁-C₄ alkyl, a C₅-C₁₂ cycloalkyl, oran aryl radical. These compounds are per se known and are described inU.S. Pat. Nos. 5,237,071 and 5,166,355, GB-A-2,303,549, DE-197,26,184and EP-A-893,119 (also expressly incorporated by reference).

In formula (8) above, the C₁-C₁₈ alkyl radicals may be linear orbranched and include, for example, methyl, ethyl, n-propyl, isopropyl,n-butyl, isobutyl, tert-butyl, tert-octyl, n-amyl, n-hexyl, n-heptyl,n-octyl, iso-octyl, n-nonyl, n-decyl, n-undecyl, n-dodecyl, tetradecyl,hexyldecyl or octadecyl; the C₅-C₁₂ cycloalkyl radicals include, forexample, cyclopentyl, cyclohexyl, cyclooctyl; and the aryl radicalsinclude, for example, phenyl or benzyl.

Among the compounds of formula (8), those having the followingstructural formula are particularly preferred:

The compound (a) with the nomenclature2,2′-methylenebis[6-(2H-benzotriazol-2-yl)4-(1,1,3,3-tetramethylbutyl)phenol]is marketed under the trademark MIXXIM BB/100 by Fairmount Chemical. Itis marketed in micronized form under the trademark TINOSORB M byCiba-Geigy.

The compound (c) with the nomenclature2,2′-methylenebis[6-(2H-benzotriazol-2-yl)-4-(methyl)phenol] is marketedunder the trademark MIXXIM BB/200 by Fairmount Chemical.

Among the organic screening agents of the vinylamide type in accordancewith the invention, exemplary are the compounds of the followingformulae which are described in WO-95/22,959 (expressly incorporated byreference):

T₁₄—(Y)r—C(═O)—C(T₁₅)═C(T₁₆)—N(T₁₇)(T₁₈)  (9)

in which T₁₄ is a C₁-C₁₈, preferably C₁-C₅, alkyl radical or a phenylgroup which is optionally substituted with one, two or three radicalsselected from among OH, C₁-C₁₈ alkyl, C₁-C₈ alkoxy, or a radical—C(=O)—TO₁₉ wherein T₁₉ is a C₁-C₁₈ alkyl radical; T₁₅, T₁₆, T₁₇ andT₁₈, which may be identical or different, are each a C₁-C₁₈, preferablyC₁-C₅, alkyl radical or a hydrogen atom; Y is N or O and r is equal to 0or 1.

Among these compounds, particularly representative are:

4-octylamino-3-penten-2-one;

ethyl 3-octylamino-2-butenoate;

3-octylamino-1-phenyl-2-buten-1-one;

3-dodecylamino-1-phenyl-2-buten-1-one.

Exemplary insoluble organic screening agents of the cinnamamide type arethose compounds described in WO-95/22,959 (expressly incorporated byreference) and having the following structural formula:

in which T₂₀ is a hydroxyl or C₁-C₄ alkoxy, preferably methoxy orethoxy, radical; T₂₁ is hydrogen, C₁-C₄ alkyl, preferably methyl orethyl; T₂₂ is a radical —(CONH)s-phenyl wherein s is equal to 0 or 1 andthe phenyl group may be substituted with one, two or three groupsselected from among OH, C₁-C₁₈ alkyl, C₁-C₈ alkoxy, or a radical—C(═O)—TO₂₃ wherein T₂₃ is a C₁-C₁₈ alkyl and more preferably T₂₃ is aphenyl, 4-methoxyphenyl or phenylaminocarbonyl group.

Also exemplary are the cinnamamide dimers such as those described inU.S. Pat. No. 5,888,481, for example, the compound having the structuralformula:

Another specific family of insoluble organic UV-screening agents inaccordance with the invention are the polyvalent metal salts (forexample Ca²⁺, Zn²⁺, Mg²⁺, Ba²⁺, Al²⁺ or Zr⁴+) of sulfonic or carboxylicorganic screening agents such as the polyvalent metal salts ofsulfonated derivatives of benzylidenecamphor, for example thosedescribed in FR-A-2,639,347; the polyvalent metal salts of sulfonatedderivatives of benzimidazole, for example those described inEP-A-893,119; and the polyvalent metal salts of cinnamic acidderivatives, for example those described in JP-87/166,517.

Also representative are the metal or ammonium or substituted ammoniumcomplexes of organic UV-A and/or UV-B screening agents as described inWO-93/10,753, WO-93/11,095 and WO-95/05,150.

The micronized insoluble organic screening agent(s) according to theinvention are generally present in the screening compositions accordingto the invention at a total concentration ranging from 0.1% and 15% byweight approximately, and preferably from 0.2% and 10% by weightapproximately, relative to the total weight of the composition.

This invention also features cosmetic or dermatological compositionscomprising at least one emulsion as described above.

The anti-sun cosmetic compositions according to the invention may ofcourse contain one or more additional organic screening agents which areactive in UV-A and/or UV-B ranges (absorbers), which are soluble in atleast one of the phases of the subject compositions. These additionalscreening agents may be selected, in particular, from among the cinnamicderivatives; the dibenzoylmethane derivatives; the salicylicderivatives, the camphor derivatives; the triazine derivatives such asthose described in U.S. Pat. No. 4,367,390, EP-0,863,145, EP-0,517,104,EP-0,570,838, EP-0,796,851, EP-0,775,698, EP-0,878,469 and EP-0,933,376;the benzophenone derivatives; the dimers derived from α-alkylstyrenesuch as those described in DE-198,55,649; the β,β′-diphenylacrylatederivatives; the benzimidazole derivatives; the bisbenzoazolylderivatives as described in EP-A-0,669,323 and U.S. Pat. No. 2,463,264;the p-aminobenzoic acid derivatives; the polymer screening agents andsilicone screening agents such as those described, in particular, inWO-93/04,665.

Exemplary such additional sunscreening agents active in the UV-A and/orUV-B ranges, which are soluble in at least one of the phases of thesubject compositions, include:

p-aminobenzoic acid;

oxyethylenated p-aminobenzoate (25 mol);

2-ethylhexyl p-dimethylaminobenzoate;

N-oxypropylenated ethyl p-aminobenzoate;

glyceryl p-aminobenzoate;

homomenthyl salicylate;

2-ethylhexyl salicylate;

triethanolamine salicylate;

4-isopropylbenzyl salicylate;

4-tert-butyl-4′-methoxydibenzoylmethane;

4-isopropyl-dibenzoylmethane;

2-ethylhexyl 4-methoxycinnamate;

methyl diisopropylcinnamate;

isoamyl 4-methoxycinnamate;

diethanolamine 4-methoxycinnamate;

menthyl anthranilate;

2-ethylhexyl-2-cyano-3,3′-diphenylacrylate;

ethyl 2-cyano-3,3′-diphenylacrylate;

2-phenylbenzimidazole-5-sulfonic acid and salts thereof;

3-(4′-trimethylammonium)benzylidenebornan-2-one methyl sulfate;

2-hydroxy-4-methoxybenzophenone;

2-hydroxy-4-methoxybenzophenone-5-sulfonate;

2,4-dihydroxybenzophenone;

2,2′-4,4′-tetrahydroxybenzophenone;

2,2′-dihydroxy-4,4′-dimethoxybenzophenone;

2-hydroxy-4-n-octoxybenzophenone;

2-hydroxy-4-methoxy-4′-methylbenzophenone;

a-(2-oxoborn-3-ylidene)tolyl-4-sulfonic acid and its soluble salts;

3-(4′-sulfo)benzylidenebornan-2-one and its soluble salts;

3-(4′-methylbenzylidene)-d,1-camphor;

3-benzylidene-d,1-camphor;

1,4-benzene[di(3-methylidene-10-camphorsulfonic)] acid and its solublesalts; urocanic acid;

2,4-bis{[4-2-ethylhexyloxy)]-2-hydroxy]phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine;

the polymer of N-(2 and4)-[(2-oxoborn-3-ylidene)methyl]benzyl]acrylamide;

1,4-bisbenzimidazolylphenylene-3,3′,5,5′-tetrasulfonic acid and itssoluble salts;

polyorganosiloxanes containing a benzalmalonate function;

polyorganosiloxanes containing a benzotriazole function such asDrometrizole Trisiloxane.

The compositions according to the invention may also contain agents fortanning and/or for artificial tanning of the skin (self-tanning agents),such as, for example, dihydroxyacetone (DHA).

The cosmetic compositions according to the invention may also containpigments or, alternatively, nanopigments (mean size of the primaryparticles: generally ranging from 5 nm to 100 nm, preferably from 10 nmto 50 nm) of metal oxides, coated or uncoated, such as, for example,nanopigments of titanium dioxide (amorphous or crystallized in therutile and/or anatase state), of iron oxide, zinc oxide, zirconium oxideor cerium oxide, which are all UV photoprotective agents well known perse. Conventional coating agents are moreover alumina and/or aluminumstearate. Such nanopigments of metal oxides, coated or uncoated, are, inparticular, described in EP-A-0,518,772 and EP-A-0,518,773.

The compositions of the invention may comprise, in addition,conventional cosmetic additives and adjuvants selected, in particular,from among fatty substances, organic solvents, thickeners, demulcents,opacifiers, colorants, stabilizers, emollients, antifoaming agents,moisturizing agents, perfumes, preservatives, polymers, fillers,sequestrants, propellants, alkalinizing or acidifying agents or anyother ingredient customarily formulated into cosmetics, in particularfor the production of anti-sun/sunscreen compositions in the form ofemulsions.

The fatty substances may be an oil or a wax or mixtures thereof, andthey also comprise fatty acids, fatty alcohols and esters of fattyacids. The oils may be selected from among animal, vegetable, mineral orsynthetic oils and, in particular, from among liquid paraffin, paraffinoil, silicone oils, volatile or otherwise, isoparaffins, polyolefins,fluorinated or perfluorinated oils. Likewise, the waxes may be animal,fossil, vegetable, mineral or synthetic waxes which are also known perse.

Exemplary organic solvents include the lower alcohols and polyols.

Of course, one skilled in this art will take care to select this orthese optional additional compounds and/or their quantities such thatthe advantageous properties, in particular the resistance to water, thestability, which are intrinsically associated with the emulsions inaccordance with the invention are not, or not substantially, altered bythe addition(s) envisaged.

The compositions of the invention may be formulated according totechniques well known to this art, in particular those suited for thepreparation of emulsions of the oil-in-water or water-in-oil type.

The subject compositions may be provided, in particular, in the form ofa simple or complex (O/W, W/O, O/W/O or W/O/W) emulsion such as a cream,a milk, a gel or a gel cream, of a powder, a lotion, an ointment, asolid stick and may optionally be packaged as an aerosol and provided inthe form of a foam, mousse or spray.

When an emulsion is provided, the aqueous phase thereof may comprise anonionic vesicular dispersion prepared according to known techniques(Bangham, Standish and Watkins, J. Mol. Biol., 13, 238 (1965),FR-2,315,991 and FR-2,416,008).

The cosmetic compositions according to the invention may be formulatedfor protecting the human epidermis or the hair against the damagingeffects of ultraviolet radiation, as an anti-sun composition or as amakeup product.

When the cosmetic compositions according to the invention are formulatedfor protecting the human epidermis against UV rays, or asanti-sun/sunscreen compositions, same may be provided in the form of asuspension or a dispersion in solvents or fatty substances, in the formof a nonionic vesicular dispersion or, alternatively, in the form of anemulsion, preferably of the oil-in-water type, such as a cream or amilk, in the form of an ointment, a gel, a gel cream, a solid stick, apowder, a stick, an aerosol foam or a spray.

When the cosmetic compositions according to the invention are formulatedfor protecting the hair against UV rays, same may be provided in theform of a shampoo, a lotion, a gel, an emulsion, a nonionic vesiculardispersion and may constitute, for example, a rinse-off composition tobe applied before or after shampooing, before or after dyeing orbleaching, before, during or after permanent-waving or hairstraightening, a hair-styling or treatment lotion or gel, a lotion orgel for blow drying or hair setting, a composition for permanent wavingor straightening, dyeing or bleaching the hair.

When the subject compositions are formulated as makeup products for theeyelashes, the eyebrows or the skin, such as a treatment cream for theepidermis, foundation, lipstick, eyeshadow, blusher, mascara oreyeliner, same may be provided in a solid or pasty, anhydrous or aqueousform, such as oil-in-water or water-in-oil emulsions, nonionic vesiculardispersions or alternatively suspensions.

For example, for the anti-sun formulations in accordance with theinvention which have a carrier, vehicle or diluent of the oil-in-wateremulsion type, the aqueous phase (comprising in particular thehydrophilic screening agents), generally constitutes from 50% to 95% byweight, preferably from 70% to 90% by weight, relative to the totalweight of the formulation, the oily phase (comprising in particular thelipophilic screening agents), from 5% to 50% by weight, preferably from10% to 30% by weight, relative to the total weight of the formulation,and the (co)emulsifier(s) from 0.5% to 20% by weight, preferably from 2%to 10% by weight, also relative to the total weight of the formulation.

As indicated above, the present invention thus features formulating thesubject emulsions for the production of cosmetic compositions forprotecting the skin and/or the hair against ultraviolet radiation, inparticular solar radiation.

This invention also features formulating associative polymers asdescribed above for the production of photoprotective cosmetic ordermatological emulsions containing at least one organic UV-screeningagent insoluble in the said emulsion, for increasing the waterresistance of its screening power (stability to water).

In order to further illustrate the present invention and the advantagesthereof, the following specific examples of formulations are given, itbeing understood that same are intended only as illustrative and innowise limitative.

EXAMPLE 1

COMPOSITION Glyceryl mono/distearate/polyethylene glycol stearate (100 2g EO) mixture (ARLACEL 165 FL - ICI) Stearyl alcohol 1 g (LANETTE 18 -HENKEL) Stearic acid of palm oil 2 g (STEARINE TP - STEARINERIE DUBOIS)Polydimethylsiloxane 0.5 g   (DOW CORNING 200 FLUID - DOW CORNING)C₁₂/C₁₅ alcohol benzoate 8 g (WITCONOL TN - WITCO) Triethanolamine 0.5g   Vinylpyrrolidone/eicosene copolymer 2 g (ANTARON V220 - ISP)4-tert-butyl-4′-methoxydibenzoylmethane) 1.5 g  (PARSOL 1789-HOFFMANNLAROCHE) Octocrylene 8 g (UVINUL N539-BASF) Titanium dioxide 3 g(TITANIUM DIOXYDE MT-1OO TV TAYCA)Methylenebis(tetramethylbutylhydroxyphenylbenzo-triazole) 4 g inmicronized insoluble form marketed the trademark TINOSORB M by CIBAGEIGY - mean particle size 0.15-0.2 μm Propylene glycol 4 g Glycerin 4 g1,4-benzene[di(3-methylidene-10-camphorsulfonic)] acid 1 g (MEXORYLSX-CHIMEX) EDTA 0.1 g   Polyacrylic acid 0.3 g   (Synthalen K - 3V)Triethanolamine qs pH: 7 Preservatives qs    Demineralized water qs 100g 

EXAMPLE 2

COMPOSITION Glyceryl mono/distearate/polyethylene glycol stearate (1001.5 g   EO) mixture (ARLACEL 165 FL - ICI) Cetyl alcohol 1 g Stearicacid of palm oil 2 g (STEARINE TP - STEARINERIE DUBOIS)Polydimethylsiloxane 0.5 g   (DOW CORNING 200 FLUID - DOW CORNING)C₁₂/C₁₅alcohol benzoate 8 g (WITCONOL TN - WITCO) Triethanolamine 0.5g   4-tert-butyl-4′-methoxydibenzoylmethane) 1 g (PARSOL 1789-HOFFMANNLAROCHE) Octocrylene 5 g (UVINUL N539-BASF) Titanium dioxide 2 g(TITANIUM DIOXYDE MT-100 TV TAYCA)Methylenebis(tetramethylbutylhydroxyphenylbenzo-triazole) 5 g inmicronized insoluble form marketed under the trademark TINOSORB M byCIBA GEIGY - mean particle size 0.15-0.2 μm Propylene glycol 4 gGlycerin 4 g 1,4-bisbenzimidazoylphenylene-3,3′-5,5′-tetrasulfonicacid - 1 g sodium salt Acrylic acid/C₁₀C₃₀ alkyl acrylate copolymer 0.3g   (PEMULEN TR1-GOODRICH) Triethanolamine qs pH: 7 Preservatives qs   EDTA 0.1 g   Demineralized water qs 100 g 

EXAMPLE 3

COMPOSITION Glyceryl mono/distearate/polyethylene glycol stearate (1001.5 g   EO) mixture (ARLACEL 165 FL - ICI) Cetyl alcohol 1 g Stearicacid of palm oil 2 g (STEARINE TP - STEARINERIE DUBOIS)Polydimethylsiloxane 0.5 g   (DOW CORNING 200 FLUID - DOW CORNING)C₁₂/C₁₅alcohol benzoate 6 g (WITCONOL TN - WITCO) Triethanolamine 0.5g   Octylmethoxycinnamate 5 g (PARSOL MCX-HOFFMANN LAROCHE)2,4-bis{[4-2-ethylhexyloxy)]-2-hydroxy]phenyl}-6-(4- 3 gmethoxyphenyl)-1,3,5-triazineMethylenebis(tetramethylbutylhydroxyphenylbenzo-triazole) 5 g inmicronized insoluble form marketed under the trademark TINOSORB M byCIBA GEIGY - mean particle size 0.15-0.2 μm Propylene glycol 4 gGlycerin 4 g Copolymer hexamethyl diisocyanate/polyethylene glycol with0.5 g   polyoxyethylenated alpha, omega stearyl end group (SER-AD FX1100(SERVO-DELDEN) 1,4-bisbenzimidazoylphenylene-3,3′-5,5′-tetrasulfonicacid - 0.5 g   sodium salt Triethanolamine qs pH: 7 Preservatives qs   Demineralized water qs 100 g 

While the invention has been described in terms of various specific andpreferred embodiments, the skilled artisan will appreciate that variousmodifications, substitutions, omissions, and changes may be made withoutdeparting from the spirit thereof. Accordingly, it is intended that thescope of the present invention be limited solely by the scope of thefollowing claims, including equivalents thereof.

What is claimed is:
 1. A topically applicable UV-photoprotectingcosmetic/dermatological emulsion comprising (a) at least one aqueousphase; (b) at least one fatty phase; (c) an effective UV-photoprotectingamount of at least one micronized organic UV-screening agent insolublein the emulsion, the mean particle size of said micronized particlesranging from 0.01 to 2 μm; and (d) at least one associative polymer,said at least one associative polymer being anionic, cationic oramphoteric.
 2. The topically applicable UV-photoprotecting emulsion asdefined by claim 1, comprising at least one associative polymercontaining at least one hydrophilic structural unit and at least oneallyl ether structural unit which comprises a fatty substituent.
 3. Thetopically applicable UV-photoprotecting emulsion as defined by claim 2,said at least one hydrophilic structural unit comprising thepolymerizate of at least one vinylcarboxylic acid and said at least oneallyl ether structural unit which comprises a fatty substituent beingobtained from a monomer having the following formula (I):CH₂═C(R′)CH₂OB_(n)R  (I) in which R′ is H or CH₃, B is the ethyleneoxyradical, n is zero or an integer ranging from 1 to 100, and R is analkyl, arylalkyl, aryl, alkylaryl or cycloalkyl radical having from 8 to30 carbon atoms.
 4. The topically applicable UV-photoprotecting emulsionas defined by claim 3, said at least one hydrophilic structural unitcomprising the polymerizate of acrylic acid, methacrylic acid or mixturethereof.
 5. The topically applicable UV-photoprotecting emulsion asdefined by claim 3, wherein formula (I), R′ is H, n is 10, and R is astearyl (C₁₈) radical.
 6. The topically applicable UV-photoprotectingemulsion as defined by claim 3, said at least one associative anionicpolymer comprising the polymerizate of from 20% to 60% by weight ofacrylic acid and/or methacrylic acid, from 5% to 60% by weight of loweralkyl (meth)acrylate, from 2% to 50% by weight of an allyl ether whichcomprises a fatty substituent and has the formula (I), and from 0% to 1%by weight of a crosslinking agent.
 7. The topically applicableUV-photoprotecting emulsion as defined by claim 6, said at least oneassociative anionic polymer comprising a crosslinked terpolymer ofmethacrylic acid, ethyl acrylate, polyethylene glycol (10 EO) stearylalcohol ether (steareth 10).
 8. The topically applicableUV-photoprotecting emulsion as defined by claim 1, comprising at leastone associative anionic polymer obtained from at least one olefinicallyunsaturated carboxylic acid hydrophilic monomer and from at least one(C₁₀-C₃₀)alkyl ester of an unsaturated carboxylic acid hydrophobicmonomer.
 9. The topically applicable UV-photoprotecting emulsion asdefined by claim 8, said at least one olefinically unsaturatedcarboxylic acid hydrophilic monomer having the following formula (II):

in which R₁ is H or CH₃ or C₂H₅, and said at least one (C₁₀-C₃₀)alkylester of an unsaturated carboxylic acid hydrophobic monomer having thefollowing formula

in which R₂ is H or CH₃ or C₂H₅ and R₃ is a C₁₀-C₃₀ alkyl radical. 10.The topically applicable UV-photoprotecting emulsion as defined by claim9, said at least one hydrophobic monomer comprising lauryl acrylate,stearyl acrylate, decyl acrylate, isodecyl acrylate or correspondingmethacrylates.
 11. The topically applicable UV-photoprotecting emulsionas defined by claim 8, said at least one associative anionic polymercomprising the polymerizate of: (i) acrylic acid, (ii) an ester havingthe following formula (III):

in which R₂ is H or CH₃ and R₃ is an alkyl radical having from 12 to 22carbon atoms, and (iii) a crosslinking agent.
 12. The topicallyapplicable UV-photoprotecting emulsion as defined by claim 8, said atleast one associative anionic polymer comprising the polymerizate offrom 95% to 60% by weight of acrylic acid, 4% to 40% by weight Of C₁-C₃₀alkyl acrylate and 0% to 6% by weight of a crosslinking polymerizablemonomer.
 13. The topically applicable UV-photoprotecting emulsion asdefined by claim 12, said at least one associative anionic polymercomprising the polymerizate of from 98% to 96% by weight of acrylicacid, 1% to 4% by weight of C₁₀-C₃₀ alkyl acrylate and 0.1% to 0.6% byweight of a crosslinking polymerizable monomer.
 14. A topicallyapplicable UV-photoprotecting cosmetic/dermatological emulsioncomprising (a) at least one aqueous phase; (b) at least one fatty phase;(c) an effective UV-photoprotecting amount of at least one micronizedorganic UV-screening agent insoluble in the emulsion, the mean particlesize of said micronized particles ranging from 0.01 to 2 μm; and (d) atleast one nonionic associative polymer selected from the groupconsisting of: (1) a cellulose modified by at least one fattysubstituent; (2) a hydroxypropylguar modified by at least one fattysubstituent; (3) a polyether/polyurethane comprising both hydrophilicsequences and hydrophobic sequences; (4) a copolymer of vinylpyrrolidoneand a hydrophobic monomer having a fatty substituent; (5) a copolymer ofC₁-C₆ alkyl methacrylate or acrylate and an amphiphilic monomer havingat least one fatty substituent; and (6) a copolymer of a hydrophilicmethacrylate or acrylate and a hydrophobic monomer having at least onefatty substituent.
 15. The topically applicable UV-photoprotectingemulsion as defined by claim 14, said at least one nonionic associativepolymer comprising a cellulose selected from the group consisting of: ahydroxyethylcellulose modified by at least one fatty alkyl, arylalkyl oralkylaryl radical, or mixture thereof: a hydroxyethylcellulose modifiedby a polyalkylene glycol ether of an alkylphenol radical.
 16. Thetopically applicable UV-photoprotecting emulsion as defined by claim 14,said at least one nonionic associative polymer comprising avinylpyrrolidone/hexadecene copolymer or a vinylpyrrolidone/eicosenecopolymer.
 17. The topically applicable UV-photoprotecting emulsion asdefined by claim 14, said at least one nonionic associative polymercomprising an oxyethylenated stearyl acrylate/methyl acrylate copolymer.18. The topically applicable UV-photoprotecting emulsion as defined byclaim 14, said at least one nonionic associative polymer comprisingpolyethylene glycol methacrylate/lauryl methacrylate copolymer.
 19. Thetopically applicable UV-photoprotecting emulsion as defined by claim 14,said at least one nonionic associative polymer comprising apolyether/polyurethane including polyoxyethylenated hydrophilicsequences.
 20. The topically applicable UV-photoprotecting emulsion asdefined by claim 14, said at least one nonionic associative polymercomprising a polyether/polyurethane having at least two hydrophobichydrocarbon chains, separated by a hydrophilic sequence, saidhydrocarbon chains being pendent chains or chains at the end of ahydrophilic sequence.
 21. The topically applicable UV-photoprotectingemulsion as defined by claim 14, said at least one nonionic associativepolymer comprising a polyether/polyurethane polyblock.
 22. The topicallyapplicable UV-photoprotecting emulsion as defined by claim 14, said atleast one nonionic associative polymer comprising apolyether/polyurethane graft or star copolymer.
 23. The topicallyapplicable UV-photoprotecting emulsion as defined by claim 14, said atleast one nonionic associative polymer comprising apolyether/polyurethane triblock copolymer which comprises apolyoxyethylenated hydrophilic sequence containing from 50 to 1000oxyethylenated groups.
 24. The topically applicable UV-photoprotectingemulsion as defined by claim 1, comprising at least one cationicassociative polymer selected from among quaternized cellulosic polymersand polyacrylates substituted with amine-containing side groups.
 25. Thetopically applicable UV-photoprotecting emulsion as defined by claim 24,comprising at least one quaternized cellulosic polymer modified by atleast one fatty alkyl, arylalkyl or alkylaryl radical, or mixturethereof, or at least one quaternized hydroxyethylcellulosic polymermodified by at least one fatty alkyl, arylalkyl or alkylaryl radical, ormixture thereof.
 26. The topically applicable UV-photoprotectingemulsion as defined by claim 24, comprising at least one polyacrylatesubstituted with amine-containing side groups, whether or notquaternized, and which comprises polyoxyethylenated (20) stearyl alcoholhydrophobic groups.
 27. The topically applicable UV-photoprotectingemulsion as defined by claim 1, comprising at least one associativeamphoteric polymer, crosslinked or non-crosslinked and branched orunbranched, and which comprises the polymerizate: (1) of at least onemonomer of formula (IVa) or (IVb):

in which R₄ and R₅, which may be identical or different, are each ahydrogen atom or a methyl radical; R₆, R₇ and R₈, which may be identicalor different, each are a linear or branched alkyl radical having from 1to 30 carbon atoms; Z is an NH group or an oxygen atom; a is an integerranging from 2 to 5; and A⁻ is an anion derived from an organic orinorganic acid; (2) of at least one monomer of formula (V):

in which R₉ and R₁₀, which may be identical or different, are each ahydrogen atom or a methyl radical; and Z₁ is an OH group or a groupNHC(CH₃)₂CH₂SO₃H; (3) of at least one monomer of formula (VI):

in which R₉ and R₁₀, which may be are identical or different, each are ahydrogen atom or a methyl radical; X is an oxygen or nitrogen atom; andR₁₁ is a linear or branched alkyl radical having from 1 to 30 carbonatoms; (4) optionally at least one crosslinking or branching agent; withthe proviso that at least one of the monomers of formulae (IVa), (IVb)or (VI) comprises at least one fatty chain having from 8 to 30 carbonatoms and with the further proviso that the compounds of the monomers offormulae (IVa), (IVb), (V) and (VI) may be quaternized.
 28. Thetopically applicable UV-photoprotecting emulsion as defined by claim 1,comprising an oil-in-water emulsion, a water-in-oil emulsion, or acomplex emulsion.
 29. The topically applicable UV-photoprotectingemulsion as defined by claim 28, comprising a simple oil-in-wateremulsion.
 30. The topically applicable UV-photoprotecting emulsion asdefined by claim 29, said at least one associative polymer emulsifyingthe oily phase into the aqueous phase.
 31. The topically applicableUV-photoprotecting emulsion as defined by claim 30, comprising from 0.1%to 20% by weight of said at least one associative polymer.
 32. Thetopically applicable UV-photoprotecting emulsion as defined by claim 1,said at least one insoluble organic UV-screening agent comprising anoxanilide, triazine, triazole, vinylamide, or cinnamide.
 33. Thetopically applicable UV-photoprotecting emulsion as defined by claim 32,said at least one insoluble organic UV-screening agent comprising anoxanilide having the structural formula (1):

in which T₁, T′₁, T₂ and T′₂, which may be identical or different, areeach a C₁-C₈ alkyl radical or a C₁-C₈ alkoxy radical.
 34. The topicallyapplicable UV-photoprotecting emulsion as defined by claim 32, said atleast one insoluble organic UV-screening agent comprising a triazinehaving the structural formula (2):

in which X₁, X₂ and X₃, which may be identical or different, are each anoxygen atom or a radical —NZ—; the radicals Z, which may be identical ordifferent, are each hydrogen or a linear or branched C₁-C₁₈ alkylradical, a C₅-C₁₂ cycloalkyl radical which may be substituted with oneor more C₁-C₄ alkyl radicals; T₃, T4 and T₅, which may be identical ordifferent, are each hydrogen, an alkali metal, an ammonium radical whichis optionally substituted with one or more alkyl or hydroxyalkylradicals, a linear or branched C₁-C₁₈ alkyl radical, a C₅-C₁₂ cycloalkylradical which is optionally substituted with one or more C₁-C₄ alkylradicals, a polyoxyethylenated radical containing from 1 to 6 ethyleneoxide units and whose terminal OH group is methylated, or a radical ofthe following formula (3), (4) or (5):

wherein T₆ is hydrogen or a methyl radical; T₇ is a C₁-C₉ alkyl radical;p is an integer ranging from 0 to 3; q is an integer ranging from 1 to10; A is a C₄-C₈ alkyl radical or a C₅-C₈ cycloalkyl radical; B is alinear or branched C₁-C₈ alkyl radical, a C₅-C₈ cycloalkyl radical, oran aryl radical which is optionally substituted with one or more C₁-C₄alkyl radicals; and T₈ is hydrogen or a methyl radical.
 35. Thetopically applicable UV-photoprotecting emulsion as defined by claim 34,said triazine UV-screening agent having the following structuralformula:

in which T is a 2-ethylhexyl radical.
 36. The topically applicableUV-photoprotecting emulsion as defined by claim 34, said triazineUV-screening agent having the following structural formula:

in which T′ is a 2-ethylhexyl radical and T is a tert-butyl radical. 37.The topically applicable UV-photoprotecting emulsion as defined by claim32, said at least one organic UV-screening agent comprising an insolubles-triazine bearing benzalmalonate and/or phenylcyanoacrylatesubstituents.
 38. The topically applicable UV-photoprotecting emulsionas defined by claim 37, said at least one triazine UV-screening agentcomprising 2,4,6-tris(diethyl 4′-aminobenzalmalonate)-s-triazine;2,4,6-tris(diisopropyl 4′-aminobenzalmalonate)-s-triazine;2,4,6-tris(dimethyl 4′-aminobenzalmalonate)-s-triazine or2,4,6-tris(ethyl α-cyano-4-aminocinnamate)-s-triazine.
 39. The topicallyapplicable UV-photoprotecting emulsion as defined by claim 32, said atleast one insoluble organic UV-screening agent comprising a triazinehaving the following structural formula:

in which R¹, R², R³ are independently phenyl, phenoxy, or pyrroloradicals, optionally substituted with one, two or three substituentsselected from among OH, C₁-C₁₈ alkyl or alkoxy, C₁-C₁₈ carboxyalkyl,C₅-C₈ cycloalkyl, a methylidenecamphor group, a radical—(CH═CH)_(n)(CO)—OR⁴, wherein R⁴ is C₁-C18 alkyl or cinnamyl, and n isequal to 0 or
 1. 40. The topically applicable UV-photoprotectingemulsion as defined by claim 32, said at least one organic UV-screeningagent comprising an s-triazine bearing benzotriazole and/orbenzothiazole substituents.
 41. The topically applicableUV-photoprotecting emulsion as defined by claim 40, said at least oneinsoluble triazine UV-screening agent comprising2,4,6-tris[(3′-benzotriazol-2-yl-2′-hydroxy-5′-methyl)phenylamino]-s-triazine,or2,4,6-tris[(3′-benzotriazol-2-yl-2′-hydroxy-5′-ter-octyl)phenylamino]-s-triazine.42. The topically applicable UV-photoprotecting emulsion as defined byclaim 32, said at least one insoluble organic UV-screening agentcomprising a triazole having the following structural formula (7):

in which T₉ is a hydrogen atom or a C₁-C₁₈ alkyl radical; and T₁₀ andT₁₁, which may be identical or different, are each a C₁-C₁₈ alkylradical which is optionally substituted with a phenyl radical.
 43. Thetopically applicable UV-photoprotecting emulsion as defined by claim 42,said compound of formula (7) being selected from among:


44. The topically applicable UV-photoprotecting emulsion as defined byclaim 32, said at least one insoluble organic UV-screening agentcomprising[2,4′-dihydroxy-3-(2H-benzotriazol-2-yl)-5-(1,1,3,3-tetramethylbutyl)-2′-n-octoxy-5′-benzoyl]diphenylmethanehaving the structural formula:


45. The topically applicable UV-photoprotecting emulsion as defined byclaim 32, said at least one insoluble organic UV-screening agentcomprising a methylenebis(hydroxyphenylbenzo-triazole) having thefollowing structural formula:

in which the radicals T₁₂ and T₁₃, which may be identical or different,are each a C₁-C₁₈ alkyl radical optionally substituted with one or moreC₁-C₄ alkyl C₅-C₁₂ cycloalkyl, or aryl radicals.
 46. The topicallyapplicable UV-photoprotecting emulsion as defined by claim 45, saidcompound of formula (8) being selected from among:


47. The topically applicable UV-photoprotecting emulsion as defined byclaim 32, said at least one insoluble organic UV-screening agentcomprising a vinylamide having the following structural formula:T₁₄—(Y)r—C(═O)—C(T₁₅)═C(T₁₆)—N(T₁₇)(T₁₈)  (9) in which T₁₄ is a C₁-C₁₈alkyl radical or a phenyl radical which is optionally substituted withone, two or three radicals selected from among OH, C₁-C₁₈ alkyl, C₁-C₈alkoxy, or a radical —C(═O)—OT₁₉ wherein T₁₉ is a C₁-C₁₈ alkyl radical;T₁₅, T₁₆, T₁₇ and T₁₈, which may be identical or different, are each aC₁-C₁₈ alkyl radical or a hydrogen atom; Y is N or 0 and r is equal to 0or
 1. 48. The topically applicable UV-photoprotecting emulsion asdefined by claim 47, said compound of formula (9) comprising4-octylamino-3-penten-2-one; ethyl 3-octylamino-2-butenoate;3-octylamino-1-phenyl-2-buten-1-one; or3-dodecylamino-1-phenyl-2-buten-1-one.
 49. The topically applicableUV-photoprotecting emulsion as defined by claim 32, said at least oneinsoluble organic UV-screening agent comprising a cinnamamide having thefollowing structural formula:

in which OT₂₀ is a hydroxyl or C₁-C₄ alkoxy radical; T₂₁ is hydrogen orC₁-C₄ alkyl; T₂₂ is a radical —(CONH)s-phenyl wherein is equal to 0 or 1and the phenyl group may be substituted with one, two or three groupsselected from among OH, C₁-C₁₈ alkyl, C₁-C₈ alkoxy, or a radical—C(═O)—OT₂₃ wherein T₂₃ is a C₁-C₁₈ alkyl, phenyl, 4-methoxyphenyl orphenylaminocarbonyl group.
 50. The topically applicableUV-photoprotecting emulsion as defined by claim 32, said at least oneinsoluble organic UV-screening agent comprising a cinnamamide dimer. 51.The topically applicable UV-photoprotecting emulsion as defined by claim50, said insoluble organic UV-screening agent having the structuralformula:


52. The topically applicable UV-photoprotecting emulsion as defined byclaim 1, said at least one insoluble organic UV-screening agentcomprising a polyvalent metal salt of a sulfonic or carboxylic organicscreening agent.
 53. The topically applicable UV-photoprotectingemulsion as defined by claim 52, said at least one insoluble organicUV-screening agent comprising a polyvalent metal salt of a sulfonatedderivative of benzylidenecamphor, a polyvalent metal salt of asulfonated derivative of benzimidazole, or a polyvalent metal salt of aderivative of cinnamic acid.
 54. The topically applicableUV-photoprotecting emulsion as defined by claim 1, said at least oneinsoluble organic UV-screening agent comprising a complex of apolyvalent metal or of ammonium with organic UV-A and/or UV-B screeningagents.
 55. The topically applicable UV-photoprotecting emulsion asdefined by claim 1, the mean particle size of said micronized particlesranging from 0.02 to 1.5 μm.
 56. The topically applicableUV-photoprotecting emulsion as defined by claim 55, the mean particlesize of said micronized particles ranging from 0.03 to 1.0 μm.
 57. Thetopically applicable UV-photoprotecting emulsion as defined by claim 1,said micronized particles having been formed by grinding courseparticulates of said insoluble organic UV-screening agent in thepresence of a surfactant.
 58. The topically applicableUV-photoprotecting emulsion as defined by claim 57, said surfactantcomprising an alkl polyglucoside having the formulaC_(n)H_(2n+1)O(C₆H₁₀O₅)_(x)H in which n is an integer ranging from 8 to16 and x is the average degree of polymerization of the structural unit(C₆H₁₀O₅) and varies from 1.4 to 1.6.
 59. The topically applicableUV-photoprotecting emulsion as defined by claim 57, said surfactantbeing present at a concentration ranging from 1% to 50% by weightrelative to the insoluble organic UV-screening agent in its micronizedstate.
 60. The topically applicable UV-photoprotecting emulsion asdefined by claim 1, formulated into a cosmetically/dermatologicallyacceptable vehicle, diluent or carrier therefor.
 61. The topicallyapplicable UV-photoprotecting emulsion as defined by claim 1, furthercomprising one or more additional organic screening agents active inUV-A and/or UV-B range, soluble in one of the phases thereof.
 62. Thetopically applicable UV-photoprotecting emulsion as defined by claim 61,said one or more additional organic screening agents being selected fromamong cinnamic derivatives; salicylic derivatives; camphor derivatives;triazine derivatives; dibenzoyl-methane derivatives; benzophenonederivatives; β, β′-diphenyl acrylate derivatives; benzimidazolederivatives; dimers of α-alkylstyrene; bisbenzoazolyl derivatives;p-aminobenzoic acid derivatives; polymer screening agents and siliconescreening agents.
 63. The topically applicable UV-photoprotectingemulsion as defined by claim 1, further comprising coated or uncoatedpigments or nanopigments of metal oxides.
 64. The topically applicableUV-photoprotecting emulsion as defined by claim 63, further comprisingpigments or nanopigments of titanium, zinc, iron, zirconium or ceriumoxides, or mixtures thereof.
 65. The topically applicableUV-photoprotecting emulsion as defined by claim 1, further comprising atleast one agent for tanning and/or for artificial tanning of the skin.66. The topically applicable UV-photoprotecting emulsion as defined byclaim 1, further comprising at least one fatty substance, organicsolvent, thickener, demulcent, opacifier, stabilizer, emollient,anti-foaming agent, moisturizing agent, perfume, preservative, colorant,polymer, filler, sequestrant, propellant, alkalinizing or acidifyingagent, or combination thereof.
 67. The topically applicableUV-photoprotecting emulsion as defined by claim 1, formulated as anonionic vesicular dispersion, a cream, a milk, a gel, a lotion, anointment, a gel cream, a suspension, a dispersion, a powder, a shampoo,a solid stick, a foam or a spray.
 68. The topically applicableUV-photoprotecting emulsion as defined by claim 1, formulated as amakeup composition for the eyelashes, the eyebrows or the skin and beingin solid or pasty, anhydrous or aqueous form, or in the form of asuspension or a dispersion.
 69. A method or regime/regimen forphotoprotecting human skin and/or hair against the deleterious effectsof ultraviolet radiation, comprising topically applying thereto aneffective amount of the UV-photoprotecting cosmetic/dermatologicalemulsion as defined by claim
 1. 70. A method or regime/regimen forphotoprotecting human skin and/or hair against the deleterious effectsof solar radiation, comprising topically applying thereto an effectiveamount of the UV-photoprotecting cosmetic/dermatological emulsion asdefined by claim
 1. 71. A cosmetic or dermatologic composition for thephotoprotection of the skin and/or the hair, comprising the emulsion ofclaim 15 and a cosmetically acceptable support.
 72. A cosmetic ordermatologic composition for the photoprotection of the skin and/or thehair, comprising the emulsion of claim 1 and a cosmetically acceptablesupport.
 73. A cosmetic or dermatologic composition for thephotoprotection of the skin and/or the hair, comprising the emulsion ofclaim 2 and a cosmetically acceptable support.
 74. A cosmetic ordermatologic composition for the photoprotection of the skin and/or thehair, comprising the emulsion of claim 3 and a cosmetically acceptablesupport.
 75. A cosmetic or dermatologic composition for thephotoprotection of the skin and/or the hair, comprising the emulsion ofclaim 8 and a cosmetically acceptable support.
 76. A cosmetic ordermatologic composition for the photoprotection of the skin and/or thehair, comprising the emulsion of claim 9 and a cosmetically acceptablesupport.
 77. A cosmetic or dermatologic composition for thephotoprotection of the skin and/or the hair, comprising the emulsion ofclaim 14 and a cosmetically acceptable support.
 78. A cosmetic ordermatologic composition for the photoprotection of the skin and/or thehair, comprising the emulsion of claim 24 and a cosmetically acceptablesupport.
 79. A cosmetic or dermatologic composition for thephotoprotection of the skin and/or the hair, comprising the emulsion ofclaim 25 and a cosmetically acceptable support.
 80. A cosmetic ordermatologic composition for the photoprotection of the skin and/or thehair, comprising the emulsion of claim 26 and a cosmetically acceptablesupport.
 81. A cosmetic or dermatologic composition for thephotoprotection of the skin and/or the hair, comprising the emulsion ofclaim 27 and a cosmetically acceptable support.